Patent · US Expired

Process utilizing release agent

US4331736A · kind A · utility

22Cited by

8References

21Claims

0Family size

Assignee

Saint-Gobain Industries · FR

Inventors

Wolfgang Schafer · Düren, DE
Helmer Radisch · Aachen, DE
Reinhold Fuchs · Fellbach, DE
Gunther Esser · Herzogenrath, DE

Key dates

Filing date	Feb 6, 1981
Grant date	May 25, 1982
Priority date	—
Expiry date	Feb 6, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31935
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In the manufacture of plastic articles, particularly thermoset plastic sheets having good optical properties, by a process which involves forming the article on a surface to which the article tends to adhere, numerous and important advantages are realized by using, as a release agent which facilitates removal of the article from the surface, a salt of an addition product of a lower alkylene oxide which can be prepared by the fixation of a lower alkylene oxide on an organic material having a group reactive therewith, such as, alcohols, acids and amides, and subjecting the resulting product to esterification and neutralization.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.